A dying world plagued by ceaseless conflictsmolders in the night sky,home to the revelations of Mars. This sourcebook expands Hollow Earth Expedition to include Mars, a dying and dangerous planet filled with strange aliens, bizarre creatures, and vast, inhospitable wastelands. Fight for survival or vie for supremacy as a marauding sky pirate, powerful robot bodyguard,... [click here for more]

First we discovered that the Earth is round.Then we discovered that it’s hollow.Now we must keep its secrets from falling into the wrong hands.
Explore one of the world’s greatest and most dangerous secrets: the Hollow Earth, a savage land filled with dinosaurs, lost civilizations, and ferocious savages! Players take on the roles of two-fisted adventurers,... [click here for more]

A discreet investigation of an ambassador’s son’s romantic entanglement reveals a deadly shadow war between criminal armies. Orchestrating the chaos is a single, mysterious figure who plans to unleash a supernatural curse on Shanghai. He must be stopped before his nefarious scheme destabilizes the balance of power throughout the world!
Five Talons of the Jade Dragon can fit into... [click here for more]

In the coldest and most isolated place on Earth, survival is a hope, not a guarantee. Admiral Byrd and his research team have been lost in the wide expanse of snow and ice of Antarctica. Death and terror shadow your every move, and all paths lead to an ancient Atlantean City where a horrifying truth lays buried deep beneath the ice.
The Frozen City of Terror can fit into your ongoing Hollow... [click here for more]

Originally included with the Hollow Earth Expedition GM Screen, this 16-page booklet is jam-packed with additional information. Inside you will find a classic sample adventure, detailed continuous combat rules, and expanded content from the core rulebook, including new Archetypes, Talents, and Flaws. ... [click here for more]

The classic Hollow Earth Expedition GM Screen allows Gamemasters to hide their notes, maps, and dice rolls behind a beautiful, 4-panel spread of the original cover artwork. Inside are the most useful charts and tables from the Hollow Earth Expedition core rulebook so that Gamemasters will always have the information they need right at their fingertips.
Note: This screen is set up to work with the... [click here for more]

After a famous historian is killed under suspicious circumstances, his fellow investigators must track down who did it and why.
The trail leads to Venice and a disturbing discovery: a long-forgotten Terra Arcanum vault containing secrets that may threaten the entire world!
The Legacy of the Terra Arcanum can fit into your ongoing Hollow Earth Expedition game or serve as a Venetian-sized... [click here for more]

An encrypted journal. A bloody assassination. A long-lost holy relic. Unraveling these mysteries will take explorers from the bustling streets of Rio de Janeiro to the deepest, darkest reaches of the Amazon jungle where even conquistadores feared to tread.
The clues point to the lost city of the Q'ero, rumored to be filled with riches beyond imagination-and a legendary holy artifact that could be... [click here for more]

A savage land of danger and beauty,lies beneath our feet,protecting the mysteries of the Hollow Earth.
This sourcebook expands Hollow Earth Expedition with even more details about the mysterious and dangerous Hollow Earth, filled with hungry dinosaurs, ferocious savages, and lost civilizations! Protect your land from invaders, or guide explorers through dangerous... [click here for more]

A lost civilization in need of a miracle. A frozen city harboring a terrifying secret. An ancient legacy best left undisturbed. A crime lord determined to conquer a hemisphere.
Hollow Earth Expedition: Perils of the Surface World compiles four adventure scenarios that span the globe and deliver a walloping punch of pulp-era adventure: Miracle Stone of the Amazon, Frozen City of... [click here for more]

Secrets of the Surface World™The most important discovery in human history
Lies beneath our feet
Hidden by the secrets of the surface world
This sourcebook expands Hollow Earth Expedition to include the mysterious and perilous surface world, filled with dangerous criminals, mad scientists, and dark sorcerers! Become a daredevil pilot, private detective,... [click here for more]